Name: Varenne Who is asking: Student Level: Secondary
Question: If a nornal to curve is parallel to x+4y+7 = 0 then these two lines have the same slope. If you write x+4y+7 = 0 as Since the normal line at a point is perpendicular to the tangent line at that point, the slope of the tangent line is 4. What remains is to differentiate the function, set the derivative equal to 4 and solve for x. Finally write the equation of the line through each such point with slope ^{1}/_{4} Cheers,Harley
